51233680

素因数分解:

$2^4\times 5^1\times {\mathrm{640421}}^1$

素因数の和:640434

約数の個数: 20

約数和(自身を含む): 119118492

約数和(自身を除く): 67884812

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 640421, 1280842, 2561684, 3202105, 5123368, 6404210, 10246736, 12808420, 25616840, 51233680]

約数ペア:

[(1, 51233680), (2, 25616840), (4, 12808420), (5, 10246736), (8, 6404210), (10, 5123368), (16, 3202105), (20, 2561684), (40, 1280842), (80, 640421)]